Lifting-jack.



H. GARDEN.

LIFTINGJACK.

APPLICATION FILED APR. 3. 1911.

LQGOlG. Patented Mar. 26, 1918.

INVENTOR www@ ATTOR NEY sus aan caricia.

l 'aman cannula, or Darst',V TENNESSEE.

LIFTING-JACK.

Specification 1of Letters Patent.

ratentea nar. ee, ieie.

Application filed April 3, 1917. 'Serial No. 159,498.

To all whom t may concern:

Be it known that l, Hilmar GARDEN, a citizen of the United States,residing at Daisy, in thel county of Hamilton and State of Y Tennessee,have invented certain new and- `a lifting'j'ack comprising a suitablybraced frame including bifurcated members each of which has a pluralityof transverse apertures wherein an adjusting'bolt may be fitr ted sothat alever arm may be mounted' upon A the bifurcated members to obtaina leverage of either the iirst or third classes.

j Another object of the invention is to lpio vide a Vlifting jack asdescribed, the movable lever `arm being adapted to receive an adjustable leg having a foot whereby such objectsV as the Asills olfhouses, mining cars, etc., may be lifted.` Y

Other objects and advantages will appear from the followingspecification, reference being had to 'the accompanying drawing inwhich: l Y

Figure 1 is a side elevation of the lifting jack showing the adjustableleg on the movable lever as being applied in raising a large object, Y

Fig. 2 is a p lan view of the parts shown in Fig. 1, l

Fig. 3 is a section on thef'line 3T3 of Fig. 1, and l Fig. 4 is a detailperspective view of the adjustable leg. Y

ln carrying out my invention I provide a fulcrum standard 1 whichincludes the upper and lower bifurcated portions '2 and 3 respectively.The `bi'furcat'ed portions ex-` which similarly bifurcated at its upperand lower portions as designated at 9 and 10. The bifurcated portion 9is provided with apertures 11 through which a holding bolt 12 is adaptedto pass and serves to secure the movable lever 7 in its adjusted po`sitions should it be found necessary to employ such a bolt in the use ofthe lifting jack.

ln such an instance it will be understood, that pressure brought to bearupon the end of the lever 7 beyond the second fulcrum standard 8, willbe difficult to maintain and therefore the use of the holding bolt 12will be found of great aid.

A bridge bar 13 is seoured'at its ends as at la in the lower bifurcatedportions 3 and 10 of thefirst and second Julcrum standards 1 and`8. 1twill be observed that the second fulcrum standard 8 lis somewhat shorterthan is the irst fulcrum standard 1. 1t will also be seen` that thestandards are not disposed vertically but are inclined at an an gie withrespect to the bridge bar 13. It his `been found frompracticalexperience that` to the object to be lifted. The handle portion 17 of the lever 7 is somewhat narrowed from the thickened portion15, so that a convenient grip may be gotten thereon; A series ofapertures 18 is formed near the frontend of the lever while anotherseries of apertures 19 is formed therein near the handle 17. lIt will beunderstood from Fig. 1 that the bolts 6 and 12 are adapted to passthrough the respective series of apertures 18 and 19.

An adjustable leg Y20 having a bifurcated upper end 21 is adapted to behung upon the front end of the lever 7 by the means of a bolt 22 whichpasses through apertures 23 in the bifurcated portion 21 and through oneof the apertures of the series 18,.

A foot 24: is formed at the lower end of the leg 20. It is some timesdesirable and necessary to employ the leg 20 as when an object is ofsuch a nature that it cannot readily be engaged by the heel 16 of thelever 7. Such an instance may be represented when a mining car has leftthetrack and tilted over so that no hold can be gotten thereon by theheel 16 of the lever 7. Obviously by forcing the foot 211 beneath thecar and then moving the lever 7 upon its fulcrum 6 until the supportingbolt 22 may be passed through the then complemental apertures 23 and 18,pressure then brought to bear on the handle portion 17 of the lever 7will effect the elevation of the derailed car.

The operation and application of the device is as follows. The liftingjack frame with its fulcrum standards 1 and 8 is moved up t0 an objectto be lifted and supported in place by the hands of the workmen untilthe lever 7 is mounted in position on its fulcrum bolt 6 and the heel 16thereof is brought into engagement with the object and a slight pressureis brought to bear upon the handle 17. It will be understood that theslight pressure on the handle 17 will serve to hold the lifting jackframe in position and it will no longer be necessary to furnish supportfor the frame through a manual agency.

The adjustment of the lever having been secured, continued pressure uponthe handle 17 will of course move the heel 16 upwardly and thus raisethe wei ght. The holding bolt 12 may be slipped into the variousapertures 11 in the fulcrum standard 8 as the handle 17 is moveddownwardly.

The adjustment of the lever 7 on the fulorum standard 1 will berecognized as that of a lever of the .first class. Should it be foundnecessary to change the adjustment so as to form a lever nf the thirdclass, the fulcrum bolt 6 may be removed and the holding bolt 12employed as the fulcrum bolt. It will be understood that at this timethe thickened portion 15 will serve as a hand-grip where the pressure isapplied and a weight hung upon the heel portion 16 will consequently beelevated.

Referring again to the specific embodiment as illustrated in Fig. 1 itwill readily be observed that upon downward movement of the handle 17the front end of the lever 7 will move upwardly and the edge of the leg20 will slide over the rearwardly inclined surface of the fulcrumstandard 1. The fulcrum standard 1 thus not only serves in its truecapacity as a support for the 1. In a lifting jack of the classdescribed the combination of a pair of similarly constructed standards,each standard being bifurcated at its ends to form central webs, abridge bar secured between the bifurcations of the lower ends spacingthe standards apart, a movable lever pivotally mounted upon one standardbetween the bifurcations thereof, said lever being adapted to be swungwithin the re? maining bifurcation of the remaining standard, means forholding said lever in a set position and an adjustable leg connected toone end of said lever.

2. In a lifting jack of the class described, the combination of a mainstandard and a secondary standard, said standards having bifurcatedends, thus forming central webs, said standards being parallel toeachother and slanting to one side, a bridge bar having its endspositioned in the bifurcations adjacent the lower end of said standards,thus holding said standards against accidental displacement, a' movablelever pivotally mounted upon the main standard, said lever being adaptedto be swung within the remaining bifurcation of the secondary standard,an adjustable leg pivotally mounted upon one end of said movable lever,whereby when said lever is swung downwardly to elevate the adjustableleg, to lift an article,

the slanting of said standard will compenthe arcuate movement of the endof sate for the lever, thus cansino the leg to ride upon the outersurface of t e main standard, and said slanting construction alsopermitting the jack to be moved contiguous to thearticle to be lifted,although providing sufficient space for the adjustable leg'at the end ofthe lever to which the same is secured. j

of the standards, thus' In testimony whereof I affix my signature i inpresence of two witnesses.

VHIRAIW GARDEN.

Witnesses:

T. H. NEWBERRY, J. W. BEAN.

Copier ot this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, D. G,

